7. Slide the system board (2) forward until the rear edge of the system board is clear of the keyboard/
top cover.
8. Remove the system board.
NOTE: The thermal material must be thoroughly cleaned from the surface of the system board components
each time the system board is removed. Replacement thermal material is included with the system board spare
part kits.
Thermal pads are located on the procesor heat sink (1) and the graphics subsystem heat sink (2).
Reverse this procedure to install the system board.
Heat sink
Description Spare part number
Heat sink (2, includes processor heat sink and graphics subsystem heat sink and replacement
thermal material)
L39050-001
Before removing the heat sink, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the computer
on, and then shut it down through the operating system.
2. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and then
unplugging the AC adapter from the computer.
3. Disconnect all external devices from the computer.
4. Remove the display panel (see Display panel on page 25), and then remove the following components:
Component replacement procedures 63
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